April 5, 2009 A.R. Big Idea: Negative numbers help us model many real world situations Essential Q: How do I add integers? Notes: Black circle: +1 Red Circle: -1
A. Use chipboard and black and red chips to find each sum. Draw a series of chipboards to illustrate your work.
1. –8 + -7 2. –8 + +7 3. +8 + -7 4. +8 + +7
B. Find the two combinations of black and red chips that will simplify to represent the given integer. Draw a series of chipboards to prove that each combination works.
-3
Problem 2.2 Follow Up:
1. What integer added to –8 gives the sum of –4?
You have to add 4 to –8 and that gives the sum of-4.
2. Give two integers with the sum that is less than either of the two integers.
-10 + 9 = -1
-32 + 8 = -23
3. Give two integers with the sum that is greater then either two of the integers.
-39 - 7 = -46
-10 + 9 = -19
A.R.
Big Idea: Negative numbers help us model many real world situations
Essential Q: How do I add integers?
Notes: Black circle: +1 Red Circle: -1
A. Use chipboard and black and red chips to find each sum. Draw a series of chipboards to illustrate your work.
1. –8 + -7
2. –8 + +7
3. +8 + -7
4. +8 + +7
B. Find the two combinations of black and red chips that will simplify to represent the given integer. Draw a series of chipboards to prove that each combination works.
Problem 2.2 Follow Up:
1. What integer added to –8 gives the sum of –4?
You have to add 4 to –8 and that gives the sum of-4.
2. Give two integers with the sum that is less than either of the two integers.
-10 + 9 = -1
-32 + 8 = -23
3. Give two integers with the sum that is greater then either two of the integers.
-39 - 7 = -46
-10 + 9 = -19